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  1. #1

    Display problem with IBM laptop


    Please forgive me if this isn't quite "newbie", but I figured it was OK since I consider myself a total linux newbie. I recently got an IBM ThinkPad A31 used from eBay.

    The computer works great, except for a problem with the screen. About 50% of the time the computer is on, there is a grid of horizontal lines on it. This pattern sometimes shifts and varies in intensity. There seems to be no correlation between the pattern and me moving the screen. When I attach an external monitor, the same artifacts show. About 10% of the times I turn the computer on, the screen is unreadable from a varying matrix of horizontal and vertical lines and weird rectangular symbols. These patterns also show when the "IBM ThinkPad" startup logo is on the screen. They are also there when I boot with a live-CD or a Windows boot disk. I currently run Mandrake 10.0, kernel 2.6.3-7mdk (or that's what it says ).

    However, when I have X set for 24-bit colour depth, there are never any problems, at least in the display manager. Setting the command line to 24-bit (in lilo.conf: vga=792) helps some, but doesn't fix the problem. I am not sure whether this is a hardware or software problem, and the fact that the display manager works well with 24-bit colours confuses me. Any suggestions?

  2. #2

  3. #3
    Linux User eugrus's Avatar
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    The computer works great, except for a problem with the screen. About 50% of the time the computer is on, there is a grid of horizontal lines on it
    I sink it is not problem of Linux/X11/Drivers, but there is something wrong with your monitor.
    Is is better to tell seller, while your ThinkPad is guaranteed.

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  5. #4
    Ok, thanks. That's what I figured as well. I just hope he is willing to cooperate..

  6. #5
    Linux Engineer psic's Avatar
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    Nov 2004
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    Ljubljana, Slovenia
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    Actually, given the fact that you tried hooking up an external monitor and you had the same problem, the culprit is probably your graphics card.
    Stumbling around the 'net:
    www.cloudyuseful.com

  7. #6
    Oh, sorry. That was what I tried to express. Must have misread the reply. I am a bit tired right now, all my exams are coming up

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